I have a 2015 Polo GTI and I'm in Australia. This issue may only apply to Oz 6Cs, built in the same Spain factory as yours but specs. no doubt vary a little.
http://www.vwwatercooled.com.au/forums/ ... 06580.html
It seems there are at least 6 VWWatercooled members who have this exact same issue - a solid clunk when changing from 2nd to 3rd at around 3500-4000rpm using the paddles. No problems when using S or D (and not using paddles) - only 2nd to 3rd, 4th to 5th no problem.
VW Australia has advised most of us it's not a recognised common issue
![Wink :wink:](./images/smilies/icon_wink.gif)
Anyone heard of this issue in UK or euro 6Cs?
Cheers